41. Glycerine is recovered from lye by
Evaporation followed by vacuum distillation
Liquid extraction technique
Extractive distillation technique
None of these
✅ The correct answer is option A.
Chemical Process MCQs
42. Dehydrogenation of isopropanol produces
Propyl alcohol
Acetone
Trichloroethylene
Formaldehyde
✅ The correct answer is option B.
43. The purpose of adding Na₂CO₃ to water of low alkalinity is to
Permit the use of alum as a coagulant
Increase the softening capacity of zeolite
Facilitate easy regeneration of zeolite
All of the above
✅ The correct answer is option A.
44. Production of one ton of dry paper pulp requires about __________ tons of bamboo or wood.
1
2.5
5
10
✅ The correct answer is option B.
45. The only commercial Fischer-Tropsch plant for producing liquid hydrocarbon fuel from coal is located at
SASOL (in South Africa)
Redcar (U.K.)
Los-Angles (U.S.A.)
Trombay (India)
✅ The correct answer is option A.
46. Maleic anhydride is produced by catalytic oxidation of
Toluene
Ethyl alcohol
Naphthalene
Benzene
✅ The correct answer is option D.
47. The most commonly used substance to speed up the sedimentation of sewage is
Lime
Sulphuric acid
Chlorine
Sodium bisulphite
✅ The correct answer is option A.
48. Plaster of Paris is
CaSO₄.½H₂O
Used for setting of broken bones
Both A and B
Same as gypsum
✅ The correct answer is option C.
49. Hydrochloric acid is also known as
Oil of vitriol
Muriatic acid
Strong organic acid
Green acid
✅ The correct answer is option B.
50. Which one of the following is not an elastomer?
Polyisoperene
Neoprene
Nitrile-butadiene
None of these
✅ The correct answer is option D.